SKU: 27586877297

Johns Manville R-30 Unfaced Fiberglass Batt Insulation, 56.83-sq ft Coverage (15.5-in W x 48-in L) – U1323S

Sale price$76.20 Regular price$84.67
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Description

Johns Manville R-30 Unfaced Fiberglass Batt Insulation, 56.83-sq ft Coverage (15.5-in W x 48-in L) – U1323SR 30 Unfaced Fiberglass Batt Insulation, 56. 83 sq ft Johns Manville R 30 unfaced fiberglass batts deliver high thermal performance for attics and ceilings with standard 16 in on center framing. Pre cut 48 in lengths press in place for fast installation, improving energy efficiency and sound control without a vapor barrier. Key Features: High R Value Performance: R 30 fiberglass batts help reduce energy costs and improve comfort Ready to Install Size:

R-30 Unfaced Fiberglass Batt Insulation, 56.83-sq ft

Johns Manville R-30 unfaced fiberglass batts deliver high thermal performance for attics and ceilings with standard 16-in on-center framing. Pre-cut 48-in lengths press in place for fast installation, improving energy efficiency and sound control without a vapor barrier.


Key Features:

  • High R-Value Performance: R-30 fiberglass batts help reduce energy costs and improve comfort
  • Ready-to-Install Size: Pre-cut 15.5-in x 48-in batts fit 16-in OC framing; press-in-place install
  • Unfaced Design: No vapor barrier—ideal for adding over existing insulation
  • Health & Safety Certifications: Formaldehyde-free, GREENGUARD Gold and SCS certified
  • Durable Composition: Will not rot or corrode pipes, wiring, or metal studs

Specifications Table:

Specification Details
Coverage Area 56.83 sq ft
Batt Dimensions 15.5 in W x 48 in L
Thickness 8.25 in
Faced/Unfaced Unfaced
Insulation Type Fiberglass
R-Value R-30
R-Value per Inch 2.9268
Stud Spacing 16 in OC
For Use in Attics Yes
For Use in Ceilings Yes
For Use in Floors Yes
For Use in Walls No
Formaldehyde Free Yes
Framing Type Wood studs
Vapor Retardant No
GREENGUARD Gold Certified Yes
ENERGY STAR Certified Yes (program partner)
Package Type Multi-pack
Package Count 11
Total Package Quantity 11
Bag Dimensions (L x W x D) 16 x 20 x 50 in
Package Weight 31.03 lb
Sound Barrier Yes
Fits 2 x 4 Walls No
Fits 2 x 6 Walls No
CA Prop 65 Warning No
Warranty 1-year limited
UNSPSC 11162400

Frequently Asked Questions (FAQ):

Q: How much area does one package cover?
A: Each package covers 56.83 square feet.


Q: Where can these batts be used?
A: They are designed for attics and ceilings and can also be used in floors with 16-in on-center framing; not for walls or masonry.


Q: Do these batts include a vapor barrier?
A: No. They are unfaced, so there is no vapor retarder and they can be added over existing insulation.


Q: What are the dimensions and thickness?
A: Each batt measures 15.5 in W x 48 in L with an 8.25-in thickness.


Q: Are there any certifications?
A: Yes—ENERGY STAR partner product; GREENGUARD Gold and SCS recycled content certified; formaldehyde-free.


Cocoon Your Home in Quiet, Efficient Comfort

This R-30 fiberglass batt nestles into your attic bays with a crisp, tailored fit, instantly softening acoustics and stabilizing temperature. I love its clean, unfaced profile—streamlined and versatile for layering over existing insulation. Pair it with matte-black attic hardware and tidy wire management for a polished, thoughtful upgrade. It’s a discreet essential that elevates everyday living with luxe comfort and efficiency.


Upgrade your attic with JM R-30 batts today for a quieter, more energy-efficient home.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 27586877297

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4.4 ★★★★★
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ChiefB & SweetieBoo
Port Orchard, US
★★★★★ 5
Great for a very aggressive chewer
Our neighbor has a lab that's trained exclusively as a duck dog. My wife and I play with her on a daily basis and these Chuck It balls and her favorite retrieval toy and hold up well to some of the most aggressive chewing I've every seen - she non-stop chews on the ball during 45 minute play times. As a duck dog she's trained to retrieve in water and these balls float very well and she's never been able to puncture a ball despite her chewing. A great value that lasts.
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Reviewed in the United States on August 26, 2022
A
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A. Stokes
Cuba, US
★★★★★ 5
great sturdy ball for aggressive chewers!
This is my 100-pound doodle's very favorite ball - he is obsessed with it. I keep at least two in storage at all times just in case his goes missing. He is a strong chewer and these are VERY difficult to destroy - not completely impossible (he put a gash in one), but pretty close!
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Reviewed in the United States on February 12, 2025
A
Verified Purchase
Alfred
Alexandria, US
★★★★★ 5
Very good!!!
The best version! Buy the rubber balls... Those last forever... The included tennis ball lasted 30 mins... Good for playing fetch especially if your dog slobbers...
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Reviewed in Singapore on 11 April 2022
J
Verified Purchase
Julia T.
Draper, US
★★★★★ 5
Better than tennis balls for dogs
Color: Orange, Size: Large
My trainer said better for my German Shepherds than tennis balls. They seem to like them, and they last a lot longer than regular tennis balls. We started using regular tennis balls as the dog ones broke first time out. They still managed to break the regular tennis balls also, just not a quickly. Once I found out tennis balls were not good on their teeth I bought these. The rubber ones are great.
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Reviewed in the United States on May 5, 2026
L
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LRBuyer
Massapequa, US
★★★★★ 5
Great product!!
Color: Orange, Size: Large
Great balls!! Very durable and my destructive lab puppy hasn’t destroyed them and loves them!!
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Reviewed in the United States on May 24, 2026

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